Joshua Young was indicted as an adult on murder and tampering with physical evidence charges Thursday.

An arrest report that was released Thursday said Young beat Trey Zwicker to death and then disposed of the weapon and his stepbrother's clothes.

"He made an adult decision that day," said Terry Zwicker, Trey's father.

Terry Zwicker said Young deserves to be tried as an adult for the alleged murder.

In the early morning of May 11, 2011, a group of Liberty High School students found the 14-year-old Zwicker beaten to death in a ditch near their school.

"Just a bunch of questions why," said Terry Zwicker. "I mean, that's still the whole thing -- nobody's really told me why. I may not ever know why, but I do know that with the judicial system, it's a long wait and that's one thing Trey didn't have."

The only thing Terry Zwicker said he knows for certain is that both boys sneaked out of the house that night.

He said Young was a pallbearer at his son's funeral, something that now leaves a bitter taste in his mouth.

Terry Zwicker said he will follow the case in court and hopes for some justice for his son.

"I believe if you take somebody's life, then yours is gone as well," he said.

Trey Zwicker's mother married Joshua Young's father, Joshua Gouker.

Gouker and Young left Kentucky this summer and an Amber Alert was issued for Young.

Gouker was eventually arrested in Alabama on kidnapping charges, which were later dismissed.

Shortly after Young returned to Kentucky, he was charged in connection with Trey Zwicker's death as a juvenile.

Police said no charges have been filed against Gouker in connection to the killing.

The potential penalty for his murder charge range from 20 years to death, while tampering with physical evidence carries a sentence of one to five years.

However, in March 2005, the United States Supreme Court ruled that the death penalty for those who had committed their crimes at under 18 years of age was cruel and unusual punishment and hence barred by the Constitution.